Mold for cement blocks.



No. 877,874. PATENTE@ JAN. 28, 1908. s. v. TSANOPP.

MOLD POR CEMENT BLOCKS'.

APPLICATION FILED PEB.7, 1907.

2 SHEETS-SHEET 2.

STOYAN V. TSANOFF,

or New YORK, N. Y.

Mom) :son CEMENT BLooKs.

No. efr/,sce

- Specification of Letters Patent.

lPatented Jan. 2s, 190s. p

Appleman sied rebmry 7.190?. serial No. 356.212 f Taall whom it 'may concern.'

Beit knownthat I, S'roYAN V. TsANOFF, a

. citizen of the United States, residing inthe in part to the con ,-city, county, and State of New York, have invented certain .new and useful Improve ments in Molds for Cement Blocks, of which the following is aspecification.

This invention relates to the class of molds or machines employed for making building blocks from .cement by what is known as the wet process, asdistinguished from thedry or pressing process. It may be explained that in the wet process of making cement blocks, the material, in a relatively thin or liquid condition, is poured into the open mold and allowed; to set and solidify, while in the other or dry process .the material, in a thick but plastic mass, is put into the mold and pressed to solidify and compact it.. The blocks molded are usually of an ob- .iong rectangular' shape and each has extending through it two passages or fluesof which 'the axes are vertical when block is laid.

The fines are so disposed in the block thatl when the blocks are laid in the wall the passages in the superposed blocks register so as to form continuous `air-flues.

The present invention relates in part to the general construction of the mold whereby economj,7 is attained and a corrugated surface is imparted to the non-exposed faces of the block; in part to the construction. of the cores which form the flues in the block, and iction which facilitates Jlity of blocks simulthe molding of taneously.

In the accompanying drawings, which illustrate embodiments of the inventionwe Figure 1 is a perspective view of a part of the mold, the section being taken substantially at line m1 in Fig. 3. Fig. 2 is a transverse section of the mold, vtaken through a core, at line x2 in Fig. 3. Fig. 3 is a plan of the mold. Fig. 4 is a perspe ve viewof theniolded block; and Fig. i a transverse section of the block through of the fines therein. Figs. 6, 7 and 'S ii fate the multiple form of the mold. Fig. if. .1s e 1ierspective view; Fig. 7 is a longitudinal, i Fig. 8 is a plan. Fig. 9 a perspective view of a back differir Llight. from that shown in Fig. 4. This x ll be iereinafter described.

Thesingle mold .is illustrated in Figs. l., 2 and 3. In these figures a, oi, designate the two sides of the mold; b, t, are the two ends, and cthe bottom plate. These will be made, prefs ical section, andb tom plate may be secured to a bottonbboard d, and this board be supported on bars B.

- The sides a and ends b are secured together at the corners by similarl or like devices seen clearly in Figs. 1 and 3. lconsist of an elbow hasp e, hinged to one part and engaging a staple f on ,the other art, and a pin g (Fig. '1), engaging saidstapi) any known way', to hold the hasp in place.

e, in

erably, of corrugatedsheet siren., The bot- This deviceniay Y The cores ane formed as clearly shown in the drawings. On one side a is-.fiXed af section h of the core; this 'section is tapered a little, made hollow from sheet-metal and open at its smaller end. On the opposite' side. ct is fixed a section t, which is longerfthan the section 7L and smaller at its innerend so that when the sides a are in place the sectionh1 will enter and 'lit snugly in the section h so as to prevent leakage of the thinniaterial from which the block is molded. thecore-sections on the opposite sides will be made to register and that they will be 4secured rigidly to the respective-sides a of. the mold so that they cannot yield. 1

It will ybenot'ed: that In order to provide horizontal airLpIa-ssages in the wall7 connecting with" thet fines F, tlieblock has in its upper and lowerfa-ces channels fi, (Figs. 4 and 5)' and these are formed by metal plates secured to the sides c, in any suitable manner.

as riveted.

in the operation of molding the block7 the parts of the mold are set upas in Fig. 3, and the sides a, secured to the endsl). The inaterial-is now poured in until the mold is full, and the surface (which is to form the exposed face of the block), is smoothed'with asuitable tool.v After the block has s olidihcd sufliciently, the mold is opened; this is effected They are shown (in Figflf) by drawing out the pins g, disengaging the" hasps e, and removing the ends b. The sides a, are now removed in such away asto draw out the core-sections h and 71.1 from the block. sections. The block now rests on. the bottom plate c, and it may be moved to any point desired by sliding the plate and block onto a suitable wheeled carriage. There'will, or may be any number of bottom plates c for and with each mold. The corrugated metal imparts its form to all the faces of the block with-which it comes in contact, 'and these corrugations aid in securing the blocks together With cement. l

Where it is desired to combine a plurality This is facilitated. by the taper of the d v on the of molds in aigroup so that a number of blocks may be molded simultaneously, the I construction seen in Figs. 6, 7 and 8 isem-y ployed. In this construction the sides a, a;

-sides el extend down between the bottom plates of adjacent molds in the group. These sides @1 are held in place at their upper edges by providing each with an apertured lugfjlc. at each end, said lug engaging a slot in the upper edge of the end-piece b1, and proon both of its faces.

' tions need not viding hooks m on the latter to engage the apertures in the respective lugs. Each intermediate side al carries core-sections fixed The operation of molding with this group of molds may be as follows. The mold being set up as in the .drawin s, the semi-liquid material is poured into al of the. molds in the group, and smoothed as before described. When the material has solidified sufficiently, the parts of thev mold are disengaged and the endpieces b1 removed. The side c at one end .of the group is now removed as'explained with reference to the operation of the single mold. The bottom plate with the end-block thereon is now drawnout in such a manner as to disenga e the block from the coreesections block is now removed and the same procedure then employed with the others.

-Itshould be borne in mind that the conditions are not the same in molding such blocks by the wet process, as in the" dry or pressure process. In the latter process fixed and interlocking core-sections cannot be used with success; and in the' wet process less stiffness and strength of the materials will serve. f

The telescopin T and interlocking core-secbe entirely' hollow; but if made solid of Wood, it is preferred to cover them with sheet-metal-` The point is to provide a cheap mold made up of separable arts, but it will be obvious that if the pin g lie left in the staple at one-side, the side and end of the mold will remainhinged together,

vas-they may be,l the hasp serving as a hinge.

The corrugations may be disposed in anw,T

The end-pieces b1 areelongated, each st intermediatel side a1. 'This rst other direction in another part thereof. By;y smoothing the face of the molded block isy merely meant that it is finished as desired with a suitable tool. j

The block shown in Fig. 9 illustrates .segg t -eral slight variations from the block seen i' Fig. 4. For example the flues F are s nearer to the outer face of the block than o the inner face thereof. This is sometim s desirable. Also, the channels i extendii g throughout the entire length of the block re omitted and recesses il substituted. Th se are to receive the fingers in lifting the blo k. Respecting the molds in the grou this vention is not limited to the mo `dends jor end-pieces b1 being all in one piece. Ob iously the several mold-ends might be each a separate part. i

Having thus described my inventionj I- claim- 1. A mold of the character described comprising a bottom,upright sides and ends ex-A tended above the bottom and having sepa rableconnections, and tapered core sections' held upon opposite sides of the mold, onejof said core sections being hollow and having its smaller end of larger diameter than the smaller end of the other core section, and adapted, when the parts are in relation, to receive the smaller end of said other core section.

2. A mold of the character described com- 'prising a bottom, upright sides and ends extended above the bottom and having separable connections, partitions extended parallel to the sides and separably connecter". with the ends and spaced from the sides and from each other, and alined tapered core sections held upon die sides and upon opposite faces of the partitions, one of each twoI adjacent core sections being hollow and having its smaller end of greater diameter than the smaller end of the adjacent core section and adapted, when the parts are in relation, to receive the smaller end of said adjacent core section.

In witness whereof I have hereunto signed my name this 31st-dayof January 1.907, in the presence of two subscribing witnesses.

STOYAN V. TSANGFF.

Witnesses:

WILLIAM J. FIRTH, H. Goss.'

lway desired; that is, they may run in one` direction on a part of the mold and in ari- 

